1:新增用户:
注:mysql数据库下user表中,Host和User为两个主键列(primary key),已经各版本下非空未设置默认字段。
登录后,切换db:
mysql> use mysql; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed
新增用户:
注:限制kaka用户的登陆ip为10.155.123.55,ip为随手写入,如果正确配置为您有效登陆ip,所有ip登陆,则设置Host为 '%'
mysql> INSERT INTO mysql.user(Host,User,Password) VALUES("10.155.123.55","kaka",PASSWORD("kaka123"));
在版本 5.6.27:
mysql> INSERT INTO mysql.user(Host,User,Password,ssl_cipher,x509_issuer,x509_subject) VALUES("10.155.123.55","kaka",PASSWORD("kaka123"),"","",""); Query OK, 1 row affected (0.03 sec)
新增用户(全sql):
INSERT INTO `user`(`Host`,`User`,`Password`,`Select_priv`,`Insert_priv`,`Update_priv`,`Delete_priv`,`Create_priv`,`Drop_priv`,`Reload_priv`,`Shutdown_priv`,`Process_priv`,`File_priv`,`Grant_priv`,`References_priv`,`Index_priv`,`Alter_priv`,`Show_db_priv`,`Super_priv`,`Create_tmp_table_priv`,`Lock_tables_priv`,`Execute_priv`,`Repl_slave_priv`,`Repl_client_priv`,`Create_view_priv`,`Show_view_priv`,`Create_routine_priv`,`Alter_routine_priv`,`Create_user_priv`,`Event_priv`,`Trigger_priv`,`Create_tablespace_priv`,`ssl_type`,`ssl_cipher`,`x509_issuer`,`x509_subject`,`max_questions`,`max_updates`,`max_connections`,`max_user_connections`,`plugin`,`authentication_string`,`password_expired`) VALUES ('%','root','*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0,'mysql_native_password','','N');
新增用户完成,刷新MySQL的系统权限相关表
mysql> flush privileges; Query OK, 0 rows affected (0.00 sec)
设置遇到问题,请查看:MySQL配置和设置问题小结
重启生效:
[root@Tony_ts_tian bin]# service mysqld restart Shutting down MySQL.... SUCCESS! Starting MySQL. SUCCESS!查询用户,Host,User,Password:
mysql> SELECT Host,User,Password FROM mysql.user; +----------------+------+-------------------------------------------+ | Host | User | Password | +----------------+------+-------------------------------------------+ | localhost | root | *71ABCA8B06D46066CEF8062A75256E66243D0FC8 | | tony\_ts\_tian | root | *71ABCA8B06D46066CEF8062A75256E66243D0FC8 | | 127.0.0.1 | root | *71ABCA8B06D46066CEF8062A75256E66243D0FC8 | | ::1 | root | *71ABCA8B06D46066CEF8062A75256E66243D0FC8 | | 10.155.123.55 | kaka | *90B3D884FB6092549F244125549B77C000A0F9C6 | | % | root | *71ABCA8B06D46066CEF8062A75256E66243D0FC8 | +----------------+------+-------------------------------------------+ 6 rows in set (0.00 sec)
2:修改信息,密码,类似可修改其他字段。
mysql> UPDATE `user` SET Password=PASSWORD("123456") WHERE Host='10.155.123.55' AND User='kaka'; Query OK, 1 row affected (0.02 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) mysql> SELECT Host,User,Password FROM `user`; 前: | 10.155.123.55 | kaka | *90B3D884FB6092549F244125549B77C000A0F9C6 | 后: | 10.155.123.55 | kaka | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
3:删除用户:
mysql> DELETE FROM `user` WHERE Host='10.155.123.55' AND User='kaka'; Query OK, 1 row affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) mysql> SELECT Host,User,Password FROM `user`; +----------------+------+-------------------------------------------+ | Host | User | Password | +----------------+------+-------------------------------------------+ | localhost | root | *71ABCA8B06D46066CEF8062A75256E66243D0FC8 | | tony\_ts\_tian | root | *71ABCA8B06D46066CEF8062A75256E66243D0FC8 | | 127.0.0.1 | root | *71ABCA8B06D46066CEF8062A75256E66243D0FC8 | | ::1 | root | *71ABCA8B06D46066CEF8062A75256E66243D0FC8 | | % | root | *71ABCA8B06D46066CEF8062A75256E66243D0FC8 | +----------------+------+-------------------------------------------+ 5 rows in set (0.00 sec)
4. 权限分配
GRANT语法: GRANT 权限 ON 数据库.* TO 用户名@'登录主机' IDENTIFIED BY '密码' 权限: ALL,ALTER,CREATE,DROP,SELECT,UPDATE,DELETE 新增用户:权限为USAGE,即为:"无权限",想要创建一个没有权限的用户时,可以指定USAGE 数据库: *.* 表示所有库的所有表 mylove.* 表示mylove库的所有表 mylove.loves 表示mylove库的loves表 用户名: MySQL的账户名 登陆主机: 允许登陆到MySQL Server的客户端ip '%'表示所有ip 'localhost' 表示本机 '10.155.123.55' 特定IP 密码: MySQL的账户名对应的登陆密码
注: IDENTIFIED BY '密码',可选。
GRANT会覆盖用户的部分信息,跟insert 、update执行功能一样。
给用户kaka分配test数据库下user表的查询select权限:
mysql> GRANT SELECT ON test.user TO kaka@'10.155.123.55' IDENTIFIED BY '123456'; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) mysql> show Grants for 'kaka'@'10.155.123.55'; +-----------------------------------------------------------------------------------------------------------------+ | Grants for kaka@10.155.123.55 | +-----------------------------------------------------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'kaka'@'10.155.123.55' IDENTIFIED BY PASSWORD '*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9' | | GRANT SELECT ON `test`.`user` TO 'kaka'@'10.155.123.55' | +-----------------------------------------------------------------------------------------------------------------+ 2 rows in set (0.00 sec)
为了快速测试,我要把ip切回%,ip全访问:
使用和测试:
数据库和数据表请看: MySQL数据定义语句:CREATE(创建)命令、ALTER(修改)命令、DROP(删除)
mysql> use mysql Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed 修改权限Host为所有ip登陆: mysql> UPDATE `user` SET Host='%' WHERE Host='10.155.123.55' AND User='kaka'; Query OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 查看kaka的权限: mysql> show grants for 'kaka'@'10.155.123.55'; +-----------------------------------------------------------------------------------------------------------------+ | Grants for kaka@10.155.123.55 | +-----------------------------------------------------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'kaka'@'10.155.123.55' IDENTIFIED BY PASSWORD '*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9' | | GRANT SELECT ON `test`.`user` TO 'kaka'@'10.155.123.55' | +-----------------------------------------------------------------------------------------------------------------+ 2 rows in set (0.00 sec) 刷新MySQL的系统权限相关表 mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) 查看kaka的权限: mysql> show grants for 'kaka'@'%'; +-----------------------------------------------------------------------------------------------------+ | Grants for kaka@% | +-----------------------------------------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'kaka'@'%' IDENTIFIED BY PASSWORD '*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9' | +-----------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec) 给用户kaka分配weloveshare数据库下user表的查询select权限: mysql> GRANT SELECT ON `weloveshare`.`user` TO kaka@'%'; Query OK, 0 rows affected (0.00 sec) 查看kaka的权限: mysql> show grants for 'kaka'@'%'; +-----------------------------------------------------------------------------------------------------+ | Grants for kaka@% | +-----------------------------------------------------------------------------------------------------+ | GRANT USAGE ON *.* TO 'kaka'@'%' IDENTIFIED BY PASSWORD '*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9' | | GRANT SELECT ON `weloveshare`.`user` TO 'kaka'@'%' | +-----------------------------------------------------------------------------------------------------+ 2 rows in set (0.00 sec) 查看weloveshare数据库下user表的数据: mysql> use weloveshare Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> select * from user; Empty set (0.00 sec) 退出当前用户: mysql> exit; Bye 切换用户kaka: [root@Tony_ts_tian ~]# mysql -u kaka -p Enter password: 登录成功。 切换数据库,查看user表数据: mysql> use weloveshare Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> select * from user; Empty set (0.00 sec) 插入数据: mysql> INSERT INTO `weloveshare`.`user`(uname,upass,ustatus) VALUES('kaka','kaka123','0'); ERROR 1142 (42000): INSERT command denied to user 'kaka'@'localhost' for table 'user' 提示:INSERT被拒绝。配置成功。
注:`weloveshare`.`user`数据库名.数据表名,kaka用户名,%为Host,ip可限制或不 localhost,%,192.168.10.% grant创建、修改、删除、更新、查询MySQL数据表结构权限: GRANT CREATE ON `weloveshare`.`user` TO kaka@'%'; GRANT ALTER ON `weloveshare`.`user` TO kaka@'%'; GRANT DROP ON `weloveshare`.`user` TO kaka@'%'; GRANT UPDATE ON `weloveshare`.`user` TO kaka@'%'; GRANT SELECT ON `weloveshare`.`user` TO kaka@'%'; grant操作MySQL外键权限: GRANT REFERENCES ON `weloveshare`.`user` TO kaka@'%'; grant操作MySQL 临时表权限: GRANT CREATE TEMPORARY TABLES ON `weloveshare`.`user` TO kaka@'%'; grant操作MySQL索引权限 GRANT INDEX ON `weloveshare`.`user` TO kaka@'%'; grant操作MySQL视图、查看视图源代码权限: GRANT CREATE VIEW ON `weloveshare`.`user` TO kaka@'%'; GRANT SHOW VIEW ON `weloveshare`.`user` TO kaka@'%'; grant操作MySQL存储过程(查看状态,删除修改)、函数权限。 GRANT CREATE ROUTINE ON `weloveshare`.`user` TO kaka@'%'; GRANT CREATE ROUTINE ON `weloveshare`.`user` TO kaka@'%'; GRANT EXECUTE ON `weloveshare`.`user` TO kaka@'%';
注:其他的详细权限,请查看,备注附件(最后)。
5:查看数据库登陆所有用户:
mysql> SELECT DISTINCT CONCAT('User: ''',user,'''@''',host,''';') AS QUERY FROM mysql.user; +--------------------------------+ | QUERY | +--------------------------------+ | User: 'kaka'@'%'; | | User: 'root'@'%'; | | User: 'root'@'127.0.0.1'; | | User: 'root'@'::1'; | | User: 'root'@'localhost'; | | User: 'root'@'tony\_ts\_tian'; | +--------------------------------+ 6 rows in set (0.00 sec)
查看某个用户的具体权限,比如root:
mysql> show grants for 'root'@'%'; +--------------------------------------------------------------------------------------------------------------------------------+ | Grants for root@% | +--------------------------------------------------------------------------------------------------------------------------------+ | GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY PASSWORD '*71ABCA8B06D46066CEF8062A75256E66243D0FC8' WITH GRANT OPTION | +--------------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec)
或
mysql> select * from mysql.user where user='root' \G注:\G为按列显示数据。
备注附件:
查看MySQL数据中user表的表结构:
mysql> DESC mysql.user; +------------------------+-------------------+------+-----+-----------+-------+ | Field | Type | Null | Key | Default | Extra | +------------------------+-------------------+------+-----+-----------+-------+ | Host | char(60) | NO | PRI | | | | User | char(16) | NO | PRI | | | | Password | char(41) | NO | | | | | Select_priv | enum('N','Y') | NO | | N | | | Insert_priv | enum('N','Y') | NO | | N | | | Update_priv | enum('N','Y') | NO | | N | | | Delete_priv | enum('N','Y') | NO | | N | | | Create_priv | enum('N','Y') | NO | | N | | | Drop_priv | enum('N','Y') | NO | | N | | | Reload_priv | enum('N','Y') | NO | | N | | | Shutdown_priv | enum('N','Y') | NO | | N | | | Process_priv | enum('N','Y') | NO | | N | | | File_priv | enum('N','Y') | NO | | N | | | Grant_priv | enum('N','Y') | NO | | N | | | References_priv | enum('N','Y') | NO | | N | | | Index_priv | enum('N','Y') | NO | | N | | | Alter_priv | enum('N','Y') | NO | | N | | | Show_db_priv | enum('N','Y') | NO | | N | | | Super_priv | enum('N','Y') | NO | | N | | | Create_tmp_table_priv | enum('N','Y') | NO | | N | | | Lock_tables_priv | enum('N','Y') | NO | | N | | | Execute_priv | enum('N','Y') | NO | | N | | | Repl_slave_priv | enum('N','Y') | NO | | N | | | Repl_client_priv | enum('N','Y') | NO | | N | | | Create_view_priv | enum('N','Y') | NO | | N | | | Show_view_priv | enum('N','Y') | NO | | N | | | Create_routine_priv | enum('N','Y') | NO | | N | | | Alter_routine_priv | enum('N','Y') | NO | | N | | | Create_user_priv | enum('N','Y') | NO | | N | | | Event_priv | enum('N','Y') | NO | | N | | | Trigger_priv | enum('N','Y') | NO | | N | | | Create_tablespace_priv | enum('N','Y') | NO | | N | | | ssl_type | enum('','ANY','X509','SPECIFIED') | NO || | | | ssl_cipher | blob | NO | | NULL | | | x509_issuer | blob | NO | | NULL | | | x509_subject | blob | NO | | NULL | | | max_questions | int(11) unsigned | NO | | 0 | | | max_updates | int(11) unsigned | NO | | 0 | | | max_connections | int(11) unsigned | NO | | 0 | | | max_user_connections | int(11) unsigned | NO | | 0 | | | plugin | char(64) | YES || mysql_native_password || | authentication_string | text | YES | | NULL | | | password_expired | enum('N','Y') | NO | | N | | +------------------------+-------------------+------+-----+-----------+-------+ 43 rows in set (0.00 sec)
查看root用户的所有具体权限:
Host: % User: root Password: *71ABCA8B06D46066CEF8062A75256E66243D0FC8 Select_priv: Y Insert_priv: Y Update_priv: Y Delete_priv: Y Create_priv: Y Drop_priv: Y Reload_priv: Y Shutdown_priv: Y Process_priv: Y File_priv: Y Grant_priv: Y References_priv: Y Index_priv: Y Alter_priv: Y Show_db_priv: Y Super_priv: Y Create_tmp_table_priv: Y Lock_tables_priv: Y Execute_priv: Y Repl_slave_priv: Y Repl_client_priv: Y Create_view_priv: Y Show_view_priv: Y Create_routine_priv: Y Alter_routine_priv: Y Create_user_priv: Y Event_priv: Y Trigger_priv: Y Create_tablespace_priv: Y ssl_type: ssl_cipher: x509_issuer: x509_subject: max_questions: 0 max_updates: 0 max_connections: 0 max_user_connections: 0 plugin: mysql_native_password authentication_string: password_expired: N
参数说明:
Select_priv:用户可以通过SELECT命令选择数据。 Insert_priv:用户可以通过INSERT命令插入数据; Update_priv:用户可以通过UPDATE命令修改现有数据; Delete_priv:用户可以通过DELETE命令删除现有数据; Create_priv:用户可以创建新的数据库和表; Drop_priv:用户可以删除现有数据库和表; Reload_priv:用户可以执行刷新和重新加载MySQL所用各种内部缓存的特定命令,包括日志、权限、主机、查询和表;重新加载权限表; Shutdown_priv:用户可以关闭MySQL服务器;在将此权限提供给root账户之外的任何用户时,都应当非常谨慎; Process_priv:用户可以通过SHOW PROCESSLIST命令查看其他用户的进程;服务器管理; File_priv:用户可以执行SELECT INTO OUTFILE和LOAD DATA INFILE命令;加载服务器上的文件; Grant_priv:用户可以将已经授予给该用户自己的权限再授予其他用户(任何用户赋予全部已有权限); References_priv;目前只是某些未来功能的占位符;现在没有作用; Index_priv:用户可以创建和删除表索引;用索引查询表; Alter_priv:用户可以重命名和修改表结构; Show_db_priv:用户可以查看服务器上所有数据库的名字,包括用户拥有足够访问权限的数据库;可以考虑对所有用户禁用这个权限,除非有特别不可抗拒的原因; Super_priv:用户可以执行某些强大的管理功能,例如通过KILL命令删除用户进程,使用SET GLOBAL修改全局MySQL变量,执行关于复制和日志的各种命令;超级权限; Create_tmp_table_priv:用户可以创建临时表; Lock_tables_priv:用户可以使用LOCK TABLES命令阻止对表的访问/修改; Execute_priv:用户可以执行存储过程;此权限只在MySQL 5.0及更高版本中有意义; Repl_slave_priv:用户可以读取用于维护复制数据库环境的二进制日志文件;此用户位于主系统中,有利于主机和客户机之间的通信;主服务器管理; Repl_client_priv:用户可以确定复制从服务器和主服务器的位置;从服务器管理; Create_view_priv:用户可以创建视图;此权限只在MySQL 5.0及更高版本中有意义; Show_view_priv:用户可以查看视图或了解视图如何执行;此权限只在MySQL 5.0及更高版本中有意义; Create_routine_priv:用户可以更改或放弃存储过程和函数;此权限是在MySQL 5.0中引入的; Alter_routine_priv:用户可以修改或删除存储函数及函数;此权限是在MySQL 5.0中引入的; Create_user_priv:用户可以执行CREATE USER命令,这个命令用于创建新的MySQL账户; Event_priv:用户能否创建、修改和删除事件;这个权限是MySQL 5.1.6新增的; Trigger_priv:用户能否创建和删除触发器,这个权限是MySQL 5.1.6新增的; Create_tablespace_priv:创建表空间 ssl_type:支持ssl标准加密安全字段 ssl_cipher:支持ssl标准加密安全字段 x509_issuer:支持x509标准字段 x509_subject:支持x509标准字段 max_questions:0 每小时允许执行多少次查询 max_updates:0 每小时可以执行多少次更新 :0表示无限制 max_connections:0 每小时可以建立的多少次连接:0表示无限制 max_user_connections:0 单用户可以同时具有的连接数:0表示无限制 plugin:5.5.7开始,mysql引入plugins以进行用户连接时的密码验证,plugin创建外部/代理用户 authentication_string:通过authentication_string可以控制两者的映射关系,(PAM plugin等,PAM可以支持多个服务名)尤其是在使用代理用户时,并须声明这一点 password_expired:密码过期 Y,说明该用户密码已过期 N相反